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49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* Copyright (C) 2003-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <fcntl.h>
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#include <sysdep.h>
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/* Advice the system about the expected behaviour of the application with
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respect to the file associated with FD. */
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int
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posix_fadvise (int fd, off_t offset, off_t len, int advise)
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{
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#if defined(__NR_fadvise64) || defined(__NR_fadvise64_64)
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INTERNAL_SYSCALL_DECL (err);
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# ifdef __NR_fadvise64
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int ret = INTERNAL_SYSCALL (fadvise64, err, 5, fd,
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__LONG_LONG_PAIR (offset >> 31, offset), len,
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advise);
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# else
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int ret = INTERNAL_SYSCALL (fadvise64_64, err, 6, fd,
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__LONG_LONG_PAIR ((long) (offset >> 31),
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(long) offset),
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__LONG_LONG_PAIR ((long) (len >> 31),
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(long) len),
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advise);
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# endif
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if (INTERNAL_SYSCALL_ERROR_P (ret, err))
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return INTERNAL_SYSCALL_ERRNO (ret, err);
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return 0;
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#else
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return ENOSYS;
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#endif
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}
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